KR20190050158A - A method of manufacturing sunglasses with pattern by using laser etching - Google Patents

Abstract

The present invention relates to a manufacturing method for a lens of sunglasses having a pattern using laser etching, comprising: (a) a step of forming a multi-coating layer on a concave surface of the lens of the sunglasses to etch a certain depth of the multi-coating layer into a grid pattern by laser etching, and to form multi-coating layers with grid patterns with different depths on the concave surface of the lens; (b) a step of performing a multi-coating on a convex surface of the lens to form a multi-coating layer; (c) a step of performing a multi-coating on a concave surface of the lens to form a multi-coating layer; and (d) a step of forming a certain pattern by laser etching on the multi-coating layer on the concave surface of the lens. According to the present invention, the manufacturing method is able to first form a colored layer on a surface of a lens or form a multi-coating layer on a concave surface of the lens and then form a colored layer or a multi-coating layer with a different depth by laser etching, to perform only an etching process after a coating process, to remarkably simplify the whole process, and to improve production efficiency.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a sunglass lens having a pattern using laser etching,

A multi-coating layer is formed on a lens concave surface of a sunglass, and then a depth of a multi-coating layer is etched in a lattice pattern by laser etching to form a multi-coating layer having a different depth on the lens concave surface. To a method for manufacturing a sunglass lens.

In addition, the present invention is characterized in that a colored layer is formed on a lens surface of a sunglass and then a colored layer is etched in a lattice pattern by laser etching to form a lattice pattern in which a colored layer is not formed, And a colored layer is formed on the surface of the colored layer.

Lenses used in optical lenses, that is, glasses, microscopes, telescopes, cameras, and the like have been used as glass materials because of their ease of use, their large size, and economy. . These chemical lenses have various advantages over glass materials, but they are inferior in transmittance and the like. For this purpose, an inorganic oxide such as silicon oxide (silica) or zirconium oxide (zirconia) was deposited on the surface of the lens to increase the light transmittance to 96 to 99%. In addition, such a lens coating reduces light scattering, reflection, diffuse reflection, and light interference. The surface of the lens is coated with a water repellent agent, or indium tin oxide is coated to prevent static electricity.

Despite the lens coating treatment as described above, problems such as irregular reflection and scattering of the lens still remain, and it is reported that a sensitive lens wearer feels inconvenience.

In order to solve such a problem, a technology has been proposed in which a lens made of a special synthetic resin material is formed in a double-layered structure, and a fine horizontal line and a vertical line are formed in a regular square between the lens and the lens. In addition, it has been proposed that a mesh screen having a width of 1.5 mm and spaced apart by 1.5 mm from a nonferrous metal or a special plastic material is put in or covered in the glasses to completely block the direct sunlight at an angle angle [Patent Document 2].

However, since the horizontal line and the vertical line are made opaque in such conventional techniques, when the glasses made of such a lens are worn, the horizontal and vertical lines are considerably exposed to deteriorate the aesthetics, and the amount of light incident on the eye is excessively reduced There is a high possibility that the visual acuity is deteriorated, and further, the visibility is lowered at night so that it can not be used.

It has also been proposed that light-absorbing mineral particles such as calcite, potassium carbonate, mica, etc., are produced in a particle size of 650 nm or less and then linearly coated on the surface of the lens so that the mineral particles absorb the scattered light 3]. This is because the supply and demand of the mineral itself is unstable and it needs to be finely pulverized with a uniform particle size so that the manufacturing process is complicated and the stability can not be obtained and the lens in everyday life In this case, the light absorbing function of the objective lens is inevitably degraded, and the peeled mineral particles are in contact with the surface of the lens Scratches may be generated on the surface to shorten the life of the lens.

In addition, a colored layer or a multi-coating layer is formed on the lens surface or the concave surface after the ink-printed layer of the lattice pattern is formed on the lens surface or the concave surface, and the ink-printed layer is removed to form a colored layer or a multi- Techniques for forming a lattice pattern have been proposed (Patent Documents 4 and 5). However, this prior art has a complicated process because it involves complex processes such as forming an ink print layer and removing it again.

Korean Utility Model Publication No. 1989-0001226 (published on March 17, 1989) Korean Utility Model Publication No. 1989-0004778 (published on April 18, 1989) Korean Registered Patent No. 10-0125112 (issued October 2, 1997) Korean Registered Patent No. 10-0686551 (issued on February 26, 2007) Korean Registered Patent No. 10-1306895 (issued on September 4, 2013) Japanese Patent Publication No. 4537148 (issued on September 1, 2010) Japanese Patent Publication No. 4698506 (issued on June 6, 2011) Korean Patent Registration No. 10-0874188 (issued on December 15, 2008)

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a multi-coating layer on a lens concave surface of a sunglass, In which a multi-coating layer of a different lattice pattern is formed.

Another object of the present invention is to provide a method for forming a colored layer on a lens surface of a sunglass and then etching the colored layer in a lattice pattern by laser etching to form a lattice pattern in which no colored layer is formed on the surface of the lens, Thereby forming a colored layer of a pattern.

In order to achieve the above object, the present invention provides a method of manufacturing a sunglass lens having a pattern, comprising the steps of: (b) forming a multi-coating layer by performing multi-coating on the convex surface of the lens; (c) forming a multi-coating layer on the concave surface of the lens by performing multi-coating; And (d) forming a predetermined pattern on the multi-coating layer of the concave surface of the lens by laser etching.

Further, the present invention is a method for manufacturing a sunglass lens having a pattern, characterized in that in the step (d), the etching depth is formed to be smaller than the thickness of the multi-coating layer of the concave surface.

Further, in the method of manufacturing a sunglass lens having a pattern, the predetermined pattern is formed on a concave surface or a convex surface of the lens.

The present invention also provides a method of manufacturing a sunglass lens having a pattern, comprising the steps of: (a) cleaning the surface of the lens; (b) forming a colored layer by coloring a predetermined hue on a surface of the lens; And (c) forming a predetermined pattern on the colored layer of the lens by laser etching.

Further, in the method of manufacturing a sunglass lens having a pattern, in the step (c), the etched depth of the pattern is formed to be smaller than the total thickness of the coloring layer (30).

As described above, according to the method of manufacturing a sunglass lens having a pattern according to the present invention, a coloring layer is formed on the surface of a lens or a multi-coating layer is formed on a lens concave surface, and then a colored layer or multi- The etching process is performed immediately after the coating process, so that the entire process can be greatly simplified and the production efficiency can be improved.

1 is a flow chart illustrating a method of manufacturing a sunglass lens having a pattern according to a first embodiment of the present invention;
FIG. 2 is a cross-sectional view of a lens according to a first embodiment of the present invention; FIG.
3 is an exemplary view showing a pattern shape of a sunglass lens according to a first embodiment of the present invention;
4 is a flow chart illustrating a method of manufacturing a sunglass lens having a pattern according to a second embodiment of the present invention;
5 is a cross-sectional view of a lens according to a second embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

In the description of the present invention, the same parts are denoted by the same reference numerals, and repetitive description thereof will be omitted.

First, a method of manufacturing a sunglass lens having a pattern according to a first embodiment of the present invention will be described with reference to Figs. 1 and 2. Fig. FIG. 1 is a flow chart for explaining a method of manufacturing a sunglass lens according to the first embodiment, and FIG. 2 is a sectional view of a lens for each step of manufacturing a sunglass lens according to the first embodiment.

First, the hard coat layer 2 is formed on the entire surface of the lens 1 (S10).

That is, the lens 1 is cleaned with a cleaning liquid and then hot air or naturally dried, and the lens 1 is immersed (dipped) in the liquid hard coating agent. Then, the hard coat layer 2 is formed on the entire surface of the lens by drying. The hard coating may be a hard coating liquid known in the art as a coating for strengthening the surface of the lens to enhance abrasion resistance or frictional resistance. At this time, preferably, a hard coating layer is formed on the entire lens 1, that is, the concave surface and the convex surface as a whole.

2 (a) shows the result of forming the hard coat layer 2 on the entire lens concave and convex surfaces.

Next, the multi-coating layer 3 is formed on the convex surface of the lens 1 (S20).

That is, the multi-coating layer 3 is formed by laminating inorganic oxides on the convex surface of the lens 1 in multiple layers. This is to improve the light transmittance of the lens.

Preferably, the multi-coating layer 3 is performed in a vacuum environment in an evaporator having a sealable chamber. More preferably, the multi-coating layer 3 is formed by laminating two or more layers selected from among silica (SiO ₂ ), zirconia (ZrO ₂ ), indium tin oxide (ITO) . As an example, it can be formed by laminating silica (SiO ₂ ), zirconia (ZrO ₂ ), silica (SiO ₂ ), indium tin oxide (ITO), zirconia (ZrO ₂ ) and silica (SiO ₂ ) The conditions and methods of multi-coating described below apply equally.

Preferably, the multi-coating layer 3 may comprise a water repellent coating. Preferably, the water-repellent coating may be a film composed of an organosilicon compound containing a fluorine atom, and may have oil repellency or anti-fouling properties in addition to water repellency.

Fig. 2 (b) shows the result of forming the multi-coating layer 3 on the convex surface of the lens 1. Fig.

Next, a multi-coating layer 3 'is formed on the concave surface of the lens 1 (S30).

That is, the multi-coating layer 3 'is formed by laminating inorganic oxides on the concave surface of the lens 1 in multiple layers. This is to improve the light transmittance of the lens. The same process as that for forming the multi-coating layer 3 on the convex surface is performed. That is, the concave multi-coating layer 3 'is performed in a vacuum environment in a deposition chamber having a sealable chamber, and is used for multi-coating such as silica (SiO ₂ ), zirconia (ZrO ₂ ), indium tin oxide And the like are laminated in a multilayer structure.

In addition, the steps 'S2' and the step 'S3' have been described for sequential order for convenience of explanation, but the order may be changed. It is also possible to simultaneously perform the respective multi-coating layers 3, 3 'on the convex surface and the concave surface through the double-side evaporator.

Preferably, the multi-coating layer 3 'is formed thicker on the concave surface of the lens 1 than the multi-coating layer 3 of the convex surface. Since the concave surface is etched by laser etching, it needs to be formed thicker than the etching depth. That is, a multi-coating layer must remain on the etched pattern part.

As an example, a multi-coating layer 3 of the convex surface previously is silica (SiO _2), zirconia (ZrO _2), silica (SiO _2), indium tin oxide (ITO), zirconia (ZrO _2), silica (SiO ₂₎ Respectively. In this case, the multi-coating layer 3 'of the concave surface can form the primary coating layer in the order of the convex surface coating, and can form the additional coating layer again in the secondary.

FIG. 2 (c) shows the result of forming the multi-coating layer 3 'on the concave surface of the lens 1. FIG.

The laser etching apparatus uses a well-known laser irradiation apparatus or a laser marker [Patent Literatures 6, 7, 8].

Next, a predetermined pattern 4 is formed on the multi-coating layer 3 'of the concave surface of the lens 1 by laser etching (S40).

That is, the multi-coating layer 3 'is etched using laser etching. At this time, preferably, the etching depth is smaller than the thickness of the multi-coating layer 3 '. That is, the multi-coating layer 3 'remains on the etched pattern portion.

As shown in FIG. 2D, the etched pattern 4 is an etched portion of the multi-coating layer 3 ', and the etched depth of the pattern is smaller than the total thickness of the multi-coating layer 3'. Therefore, a portion of the multi-coating layer 3 'remains in the etched pattern 4 portion.

At this time, the etched pattern 4 and the remaining multi-coating layer 3 'that are not etched form a single layer and are formed by partitioning a predetermined pattern. The un-etched multi-coating layer 3 'is thicker than the multi-coating layer 3' of the etched pattern, but the same thickness as the multi-coating layer 3 '.

Therefore, since the pattern of the predetermined pattern is formed due to the difference in thickness of the multi-coating layer, the pattern can not be easily distinguished by the naked eye, and the scattering of light can be prevented by the pinhole effect while the pattern pattern is not normally exposed, have. In addition, the pattern is clearly visible when the surface on which the pattern is formed is blurred or the surface is smoothed by the difference in temperature, or in the light of a fluorescent lamp, and it can be confirmed that the lens is a patterned lens for the pinhole effect.

Although FIGS. 1 and 2 illustrate that the pattern is formed on the concave surface of the lens 1, the pattern may be formed on the convex surface of the lens 1, if necessary. In addition, when the multi-coating layer 3 is laminated on the hard coating layer 2, if it is desired to form a pattern by the difference in thickness of the multi-coating layer on the surface of a kind of lens not requiring hard coating, (S10) can be omitted.

Next, a pattern shape of the sunglass lens according to the first embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 3, the various types of patterns formed on the lens are formed by an etching pattern (pattern) 4 by laser etching. At this time, the shape may be a lattice pattern as shown in (a), a honeycomb pattern as shown in (b), or a circular pattern having a plurality of circular shapes as shown in (c). Also, a rectangular pattern having a plurality of rectangular shapes as shown in (d) may be used.

In the present invention, the predetermined pattern is not limited to the illustrated shape, but includes all patterns of patterns having a pinhole effect due to the thickness difference of the multi-coating layer.

Next, a method of manufacturing a sunglass lens having a pattern according to a second embodiment of the present invention will be described with reference to Figs. 4 and 5. Fig. FIG. 4 is a flowchart illustrating a method of manufacturing a sunglass lens according to a second embodiment, and FIG. 5 is a sectional view of a lens according to a manufacturing process of a sunglass lens according to the second embodiment.

The second embodiment of the present invention is a method of forming a pattern by forming a colored layer on a sunglass lens and etching the colored layer with a laser. The coloring layer 30 is formed on the other surface of the lens 10 except for the grid pattern 40 so that the surface of the lens 10 is in the form of a checkered pattern A layer 30 is formed. Alternatively, the thickness of the colored layer 30 on which the pattern is formed is smaller than the thickness of the colored layer 30 on which the pattern is not formed.

Here, the colored layer 30 is also a region through which light is transmitted as in a general colored lens. The lattice pattern 40 is a thin line having widths of 0.1 mm to 0.5 mm in width and length, and a pure lens 10 Or is thicker than the coloring layer of the lattice pattern 40 and is also a region through which light can be transmitted.

As shown in FIGS. 4 and 5, first, the surface of the lens 10 is cleaned (S110). That is, dust or foreign substances remaining on the surface of the lens 10 are cleaned using a cleaning liquid such as acetone.

Next, the coloring layer 30 is formed by coloring a predetermined hue on the surface of the lens 10 (S120).

That is, the lens 10 is dipped into the high-temperature colored solution or the colored solution is applied to the surface of the lens 10. In addition, any known method for coloring the lens surface can be applied. Preferably, in order to make the thickness of the coloring layer 30 formed on the lens 10 uniform, a technique of immersing in a high-temperature coloring solution is used.

Further, the coloring solution forming the coloring layer 30 is not a completely blocked light, but a transparent coloring liquid with a slight hue, and there is no limitation as long as it is generally used for coloring a lens. After the coloring liquid is coated on the surface of the lens 10, the coloring layer 30 is cured by drying it for 1 hour to 3 hours under a hot air of 60 to 100 캜.

The high-temperature colored solution penetrates the surface region of the lens 10 to form a thin film-like colored layer 30 as shown in Fig. 5 (a).

Next, a predetermined pattern is formed on the colored layer 30 of the lens 10 by laser etching (S130).

That is, the coloring layer 30 is etched using laser etching. At this time, preferably, the etching depth is formed to be smaller than the thickness of the colored layer 30. That is, the colored layer 30 remains in the etched pattern portion.

5B, the etched pattern 40 is an etched portion of the coloring layer 30, and the etched depth of the pattern is smaller than the total thickness of the coloring layer 30. Accordingly, a part of the colored layer 30 remains in the portion of the etched pattern 40.

At this time, the etched pattern 40 and the remaining coloring layer 30 that are not etched are formed as a single layer and a predetermined pattern is defined. The uncoloured coloring layer 30 becomes thicker than the coloring layer 30 'of the etched pattern, but the same thickness.

Therefore, since the pattern of the predetermined pattern is formed by the difference in the thickness of the colored layer, the pattern can not be easily distinguished by the naked eye, and the scattering of light can be prevented by the pinhole effect while the pattern pattern is not normally exposed, have. In addition, the pattern is clearly visible when the surface on which the pattern is formed is blurred or the surface is smoothed by the difference in temperature, or in the light of a fluorescent lamp, and it can be confirmed that the lens is a patterned lens for the pinhole effect.

In the etching pattern 40, the widths of the horizontal and vertical lines are etched into thin lines in the range of 0.1 mm to 0.5 mm, respectively. In addition, the etching pattern 40 may be formed in a checkered pattern or may be formed in various shapes as shown in FIG.

Next, a hard coating layer may be formed on the surface of the lens 10 (S140) to form a multi-coating layer.

Here, the lens 10 may be a glass material or a transparent synthetic resin material. In particular, in the case of a synthetic resin, a lens hard coating step (S140) may be performed to enhance abrasion resistance or frictional resistance of the lens surface.

In the lens hard coating step S140, a film of a high-hardness silicon-based resin is coated on the surface of the lens 10, and the lens hard coating step S140 is usually prepared by immersing the lens in a liquid high hardness silicone type resin and then drying. Further, since this is a technique commonly used in the art, a more detailed description will be omitted.

Preferably, the lens hard coating step S140 and the lens multi-coating step S150 may be further included. The lens multi-coating step (S150) is also referred to as an anti-reflective multi-coating, and is a process for depositing a thin film by depositing magnesium fluoride, aluminum oxide or the like on the surface of the lens in a vacuum state, A detailed description thereof will be omitted.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

1: lens 2: hard coat layer
3: multi-coating layer 4: pattern
10: Lens
30: colored layer 40: etching pattern

Claims (5)

A method of manufacturing a sunglass lens having a pattern,
(b) performing a multi-coating on the convex surface of the lens to form a multi-coating layer;
(c) forming a multi-coating layer on the concave surface of the lens by performing multi-coating; And
(d) forming a predetermined pattern by laser etching on the multi-coating layer of the concave surface of the lens.
The method according to claim 1,
Wherein the depth of the etching is smaller than the thickness of the multi-coating layer of the concave surface in the step (d).
The method according to claim 1,
Wherein the predetermined pattern is formed on a concave surface or a convex surface of the lens.
A method of manufacturing a sunglass lens having a pattern,
(a) cleaning the surface of the lens;
(b) forming a colored layer by coloring a predetermined hue on a surface of the lens; And
(c) forming a predetermined pattern on the colored layer of the lens by laser etching.
The method according to claim 1,
Wherein the etched depth of the pattern is smaller than the total thickness of the coloring layer (30) in the step (c).

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